I also echo the "lace up only" sentiment. Slip ons are for commercial bankers and insurance salesmen, lol.
If you really want to be a baller, get some John Lobbs:
JOHN LOBB
You can either get "ready to wear" or you can have them custom-create for your own foot. The latter option tends to cost like $2600 for the first pair and then about $1200/pr for each thereafter (as first pair includes cost of custom fitting).
And no, I don't buy these fucking ridiculous things, but they're still awesome. If I could afford $1200 dress shoes I'd be in the bathroom of a Monte Carlo casino right now with my face in a bowl of coke. No one buys John Lobbs except for hedge fund managers and, well, hedge fund managers.
In the "real world", I like Johnston & Murphy and Allen Edmonds. They hold up well and they look classic.